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- T. J. Stasevich, Hailu Gebremariam, T. L. Einstein, H. Ibach
- 2005

For hexagonal nets, descriptive of ͕111͖ fcc surfaces, we derive from combinatoric arguments a simple, low-temperature formula for the orientation dependence of the surface step line tension and stiffness, as well as the leading correction, based on the Ising model with nearest-neighbor ͑NN͒ interactions. Our formula agrees well with experimental data for… (More)

- Zhihai Cheng, Jonathan Wyrick, Miaomiao Luo, Dezheng Sun, Daeho Kim, Yeming Zhu +4 others
- Physical review letters
- 2010

Nanoscale confinement of adsorbed CO molecules in an anthraquinone network on Cu(111) with a pore size of ≈4 nm arranges the CO molecules in a shell structure that coincides with the distribution of substrate confined electronic states. Molecules occupy the states approximately in the sequence of rising electron energy. Despite the sixfold symmetry of the… (More)

Single-layer graphene (SLG) supported on SiO(2) shows anomalously large chemical reactivity compared to thicker graphene, with charge inhomogeneity-induced potential fluctuations or topographic corrugations proposed as the cause. Here we systematically probe the oxidative reactivity of graphene supported on substrates with different surface roughnesses and… (More)

Spurred by recent theoretical predictions [Phys. Rev. E 69, 035102(R) (2004)10.1103/PhysRevE.69.035102; Surf. Sci. Lett. 598, L355 (2005)10.1016/j.susc.2005.09.023], we find experimentally using STM line scans that the fluctuations of the step bounding a facet exhibit scaling properties distinct from those of isolated steps or steps on vicinal surfaces. The… (More)

Using a van der Waals density functional ͑vdW-DF͒ ͓Phys. Rev. Lett. 92, 246401 ͑2004͔͒, we perform ab initio calculations for the adsorption energy of benzene ͑Bz͒ on Cu͑111͒ as a function of lateral position and height. We find that the vdW-DF inclusion of nonlocal correlations ͑responsible for dispersive interactions͒ changes the relative stability of… (More)

- Sabine Dieluweit, Harald Ibach, Margret Giesen, T. L. Einstein
- 2003

We have investigated the step stiffness on Cu͑001͒ surfaces as a function of step orientation by two independent methods at several temperatures near 300 K. Both sets of data agree well and show a substantial dependence of the stiffness on the angle of orientation. With the exception of steps oriented along ͗110͘, the experimental stiffness is significantly… (More)

We study theoretically the equilibrium fluctuations of steps on vicinal surfaces. From an analytical continuum description of the step edge, we find a single Langevin equation governing the motion of an isolated step around its equilibrium position that includes attachment/detachment of atoms, diffusion over the terrace, diffusion along the edge, and… (More)

- Timothy J. Stasevich, Theodore L. Einstein, Mikhail A. Anisimov, Jeff Prentis
- 2006

- Amber N. Benson, Howard L. Richards, T. L. Einstein
- 2006

The pairwise Einstein model of steps not only justifies the use of the generalized Wigner distribution ͑GWD͒ for terrace width distributions ͑TWDs͒, it also predicts a specific form for the step position distribution ͑SPD͒, i.e., the probability density function for the fluctuations of a step about its average position. The predicted form of the SPD is well… (More)